1. Trachea Anatomy : ENT MCQ Which of the following statements is true regarding normal tracheal anatomy and structure?a) The trachea is posterior to the esophagusb) The trachea is 4 cm longc) The trachea is 4 cm in diameterd) The trachea divides into right and left main stem bronchi below the sternal anglee) The trachea is to the right of the midlineCorrect Answer: d) The trachea divides into right and left main stem bronchi below the sternal angle.